If \(1011_2\) + \(X_7\) = \(25_{10}\), solve for X.
คำตอบ
(A)
207
2
Evaluate [\(\frac{1}{0.03}\) \(\div\) \(\frac{1}{0.024}\)]-1 correct to 2 decimal places
คำตอบ
(B)
1.25
3
If \(b^3\) = \(a^{-2}\) and \(c^{\frac{1}{3}}\) = \(a^\frac{1}{2}\)b, express c in terms of a
คำตอบ
(A)
a-\(\frac{1}{2}\)
4
Given that log4(Y - 1) + log4(\(\frac{1}{2}\)x) = 1 and log2(y + 1) + log2x = 2, solve for x and y respectively
คำตอบ
(C)
-2, -3
5
Find the value of k if \(\frac{k}{\sqrt{3} + \sqrt{2}}\) = k\(\sqrt{3 - 2}\)
คำตอบ
(D)
\(\sqrt 2\)
6
A market woman sells oil in cylindrical tins 10cm deep and 6cm in diameter at N15.00 each. If she bought a full cylindrical jug 18cm deep and 10cm in diameter for N50.00, how much did she make by selling all the oil?
คำตอบ
(D)
N25.00
7
A man is paid r naira per hour for normal work and double rate for overtime. if he does a 35-hour week which includes q hours of overtime, what is his weekly earning in naira?
คำตอบ
(D)
r(35 + 2q)
8
When the expression pm\(^2\) + qm + 1 is divided by (m - 1), it has a remainder is 2, and when divided by (m + 1), the remainder is 4. Find p and q respectively
คำตอบ
(A)
2, -1
9
Factorize r2 - r(2p + q) + 2pq
คำตอบ
(C)
(r - q)(r - 2p)
10
Solve for the equation \(\sqrt{x}\) - \(\sqrt{(x - 2)}\) - 1 = 0
คำตอบ
(D)
\(\frac{9}{4}\)
11
Make \(\frac{a}{x}\) the subject of formula \(\frac{x + a}{x - a}\) = m
Express in partial fractions \(\frac{11x + 2}{6x^2 - x - 1}\)
คำตอบ
(D)
\(\frac{1}{3x + 1}\) + \(\frac{3}{2x - 1}\)
14
If x is a positive real number, find the range of values for which \(\frac{1}{3x}\) + \(\frac{1}{2}\) > \(\frac{1}{4x}\)
คำตอบ
(D)
0 < x < \(\frac{1}{6}\)
15
If p + 1, 2P - 10, 1 - 4p2are three consecutive terms of an arithmetic progression, find the possible values of p
คำตอบ
(C)
-\(\frac{4}{11}\), 2
16
The sum of the first three terms of a geometric progression is half its sum to infinity. Find the positive common ratio of the progression.
คำตอบ
(B)
\(\frac{1}{\sqrt[3]{2}}\)
17
The identity element with respect to the multiplication shown in the diagram below is \(\begin{array}{c|c} \otimes & p & p & r & s \\ \hline p & r & p & r & p
\\ q & p & q & r & s\\ r & r & r & r & r\\ s & q & s & r & q\end{array}\)
คำตอบ
(B)
q
18
The binary operation \(\ast\) is defined by x \(\ast\) y = xy - y - x for all real values x and y. If x \(\ast\) 3 = 2\(\ast\) x, find x
คำตอบ
(C)
1
19
The determinant of matrix \(\begin{pmatrix} x & 1 & 0 \\ 1-x & 2 & 3 \\ 1 & 1+x & 4\end{pmatrix}\) in terms of x is
คำตอบ
(B)
-3x2 + 9x - 1
20
Let I = \(\begin{pmatrix} 1 & 0 \\ 0 & 1 \end{pmatrix}\) p = \(\begin{pmatrix} 2 & 3 \\ 4 & 5 \end{pmatrix}\) Q = \(\begin{pmatrix} u & 4+u \\ -2v & v \end{pmatrix}\) be 2 x 2 matrices such that PQ = I. Find (u, v)
คำตอบ
(A)
(-\(\frac{5}{2}\) - 1)
21
a cylindrical drum of diameter 56 cm contains 123.2 litres of oil when full. Find the height of the drum in centimeters
คำตอบ
(D)
50.00
22
The locus of all points at a distance 8cm from a point N passes through points T and S. If S is equidistant from T and N, find the area of triangle STN.
คำตอบ
(B)
16\(\sqrt{3cm^2}\)
23
If the distance between the points (x, 3) and (-x, 2) is 5. Find x
คำตอบ
(C)
\(\sqrt{6}\)
24
The midpoint of the segment of the line y = 4x + 3 which lies between the x-ax 1 is and the y-ax 1 is
คำตอบ
(D)
(-\(\frac{3}{8}\), \(\frac{3}{2}\))
25
solve the equation cos x + sin x = \(\frac{1}{cos x - sinx}\) for values of such that 0 \(\leq\) x < 2\(\pi\)
คำตอบ
(D)
0, \(\pi\)
26
From the top of a vertical mast 150m high., two huts on the same ground level are observed. One due east and the other due west of the mast. Their angles of depression are 60o and 45o respectively. Find the distance between the huts
คำตอบ
(B)
50(3 + \(\sqrt{3}\))m
27
If y = 243(4x + 5)-2, find \(\frac{dy}{dx}\) when x = 1
คำตอบ
(A)
\(\frac{-8}{3}\)
28
Differentiate \(\frac{x}{cosx}\) with respect to x
คำตอบ
(D)
x sec x tan x + secx
29
Evaluate ∫\(^{\pi}_{2}\)(sec2 x - tan2x)dx
คำตอบ
(B)
\(\pi\) - 2
30
find the equation of the curve which passes through by 6x - 5
คำตอบ
(D)
3x2 - 5x + 3
31
If m and n are the mean and median respectively of the set of numbers 2, 3, 9, 7, 6, 7, 8, 5, find m + 2n to the nearest whole number
Estimate the mode of the above frequency distribution
คำตอบ
(C)
12.9
33
Find the variance of the numbers k, k+1, k+2,
คำตอบ
(A)
\(\frac{2}{3}\)
34
Find the positive value of x if the standard deviation of the numbers 1, x + 1, 2x + 1 is 6
คำตอบ
(C)
3
35
A bag contains 16 red balls and 20 blue balls only. How many white balls must be added to the bag so that the probability of randomly picking a red ball is equal to \(\frac{2}{5}\)
คำตอบ
(A)
4
36
In a recent zonal championship games involving 10 teams, teams X and Y were given probabilities \(\frac{2}{5}\) and \(\frac{1}{3}\) respectively of winning the gold in the football event. What is the probability that either team will win the gold?
คำตอบ
(C)
\(\frac{11}{15}\)
37
If x, y can take values from the set (1, 2, 3, 4), find the probability that the product of x and y is not greater than 6
คำตอบ
(A)
\(\frac{5}{8}\)
38
For what value of x does 6 sin (2x - 25)o attain its maximum value in the range 0o \(\leq\) x \(\leq\) 180o
คำตอบ
(C)
57\(\frac{1}{2}\)
39
In the venn diagram, the shaded region is?
คำตอบ
(C)
(P \(\cap\) Q1) \(\cap\) R
40
The shaded area represents
คำตอบ
(A)
x \(\leq\) 0, y \(\leq\) 0, 2y + 3x \(\leq\) 6
41
In the diagram, PR is a diameter of the circle PQRS. PST and QRT are straight lines. Find QRS
คำตอบ
(B)
25o
42
In diagram, PQ || ST and < PQR = 120º, < RST = 130º, find the angle marked x
คำตอบ
(C)
70
43
In the figure, PQST is a parallelogram and TSR is a straight line. If the area of \(\bigtriangleup\)QRS is 20cm2, find the area of the trapezium PQRT.
คำตอบ
(C)
70cm2
44
TQ is tangent to circle XYTR, < YXT = 32o, RTQ = 40o. find < YTR
คำตอบ
(A)
108o
45
In the diagram, QTR is a straight line and < PQT = 30o. find the sin of < PTR
